Question: When did Jozef Lenart end his time as head of government for Czechoslovakia?
Paraphrase: Tell me the date that Jozef Lenart ended his time as head of government for Czechoslovakia.
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q33946 p:P6 ?s . ?s ps:P6 wd:Q465455 . ?s pq:P582 ?value}